package com.ruoyi.common.utils.http;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.ConnectException;
import java.net.SocketTimeoutException;
import java.net.URL;
import java.net.URLConnection;
import java.security.cert.X509Certificate;
import javax.net.ssl.HostnameVerifier;
import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSession;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.ruoyi.common.constant.Constants;

/**
 * 通用http发送方法
 * 
 * @author ruoyi
 */
public class HttpUtils{
	private static final Logger log = LoggerFactory.getLogger(HttpUtils.class);

	/**
	 * 向指定 URL 发送GET方法的请求
	 *
	 * @param url 发送请求的 URL
	 * @param param 请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
	 * @return 所代表远程资源的响应结果
	 */
	public static String sendGet(String url, String param){
		return sendGet(url, param, Constants.UTF8);
	}

	/**
	 * 向指定 URL 发送GET方法的请求
	 *
	 * @param url 发送请求的 URL
	 * @param param 请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
	 * @param contentType 编码类型
	 * @return 所代表远程资源的响应结果
	 */
	public static String sendGet(String url, String param, String contentType){
		StringBuilder result = new StringBuilder();
		BufferedReader in = null;
		try{
			String urlNameString = url + "?" + param;
			log.info("sendGet - {}", urlNameString);
			URL realUrl = new URL(urlNameString);
			URLConnection connection = realUrl.openConnection();
			connection.setRequestProperty("accept", "*/*");
			connection.setRequestProperty("connection", "Keep-Alive");
			connection.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
			connection.connect();
			in = new BufferedReader(new InputStreamReader(connection.getInputStream(), contentType));
			String line;
			while((line = in.readLine()) != null){
				result.append(line);
			}
			log.info("recv - {}", result);
		}catch(ConnectException e){
			log.error("调用HttpUtils.sendGet ConnectException, url=" + url + ",param=" + param, e);
		}catch(SocketTimeoutException e){
			log.error("调用HttpUtils.sendGet SocketTimeoutException, url=" + url + ",param=" + param, e);
		}catch(IOException e){
			log.error("调用HttpUtils.sendGet IOException, url=" + url + ",param=" + param, e);
		}catch(Exception e){
			log.error("调用HttpsUtil.sendGet Exception, url=" + url + ",param=" + param, e);
		}finally{
			try{
				if(in != null){
					in.close();
				}
			}catch(Exception ex){
				log.error("调用in.close Exception, url=" + url + ",param=" + param, ex);
			}
		}
		return result.toString();
	}

	/**
	 * 向指定 URL 发送POST方法的请求
	 *
	 * @param url 发送请求的 URL
	 * @param param 请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
	 * @return 所代表远程资源的响应结果
	 */
	public static String sendPost(String url, String param){
		PrintWriter out = null;
		BufferedReader in = null;
		StringBuilder result = new StringBuilder();
		try{
			String urlNameString = url + "?" + param;
			log.info("sendPost - {}", urlNameString);
			URL realUrl = new URL(urlNameString);
			URLConnection conn = realUrl.openConnection();
			conn.setRequestProperty("accept", "*/*");
			conn.setRequestProperty("connection", "Keep-Alive");
			conn.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
			conn.setRequestProperty("Accept-Charset", "utf-8");
			conn.setRequestProperty("contentType", "utf-8");
			conn.setDoOutput(true);
			conn.setDoInput(true);
			out = new PrintWriter(conn.getOutputStream());
			out.print(param);
			out.flush();
			in = new BufferedReader(new InputStreamReader(conn.getInputStream(), "utf-8"));
			String line;
			while((line = in.readLine()) != null){
				result.append(line);
			}
			log.info("recv - {}", result);
		}catch(ConnectException e){
			log.error("调用HttpUtils.sendPost ConnectException, url=" + url + ",param=" + param, e);
		}catch(SocketTimeoutException e){
			log.error("调用HttpUtils.sendPost SocketTimeoutException, url=" + url + ",param=" + param, e);
		}catch(IOException e){
			log.error("调用HttpUtils.sendPost IOException, url=" + url + ",param=" + param, e);
		}catch(Exception e){
			log.error("调用HttpsUtil.sendPost Exception, url=" + url + ",param=" + param, e);
		}finally{
			try{
				if(out != null){
					out.close();
				}
				if(in != null){
					in.close();
				}
			}catch(IOException ex){
				log.error("调用in.close Exception, url=" + url + ",param=" + param, ex);
			}
		}
		return result.toString();
	}

	public static String sendSSLPost(String url, String param){
		StringBuilder result = new StringBuilder();
		String urlNameString = url + "?" + param;
		try{
			log.info("sendSSLPost - {}", urlNameString);
			SSLContext sc = SSLContext.getInstance("SSL");
			sc.init(null, new TrustManager[]{new TrustAnyTrustManager()}, new java.security.SecureRandom());
			URL console = new URL(urlNameString);
			HttpsURLConnection conn = (HttpsURLConnection)console.openConnection();
			conn.setRequestProperty("accept", "*/*");
			conn.setRequestProperty("connection", "Keep-Alive");
			conn.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
			conn.setRequestProperty("Accept-Charset", "utf-8");
			conn.setRequestProperty("contentType", "utf-8");
			conn.setDoOutput(true);
			conn.setDoInput(true);

			conn.setSSLSocketFactory(sc.getSocketFactory());
			conn.setHostnameVerifier(new TrustAnyHostnameVerifier());
			conn.connect();
			InputStream is = conn.getInputStream();
			BufferedReader br = new BufferedReader(new InputStreamReader(is));
			String ret = "";
			while((ret = br.readLine()) != null){
				if(ret != null && !ret.trim().equals("")){
					result.append(new String(ret.getBytes("ISO-8859-1"), "utf-8"));
				}
			}
			log.info("recv - {}", result);
			conn.disconnect();
			br.close();
		}catch(ConnectException e){
			log.error("调用HttpUtils.sendSSLPost ConnectException, url=" + url + ",param=" + param, e);
		}catch(SocketTimeoutException e){
			log.error("调用HttpUtils.sendSSLPost SocketTimeoutException, url=" + url + ",param=" + param, e);
		}catch(IOException e){
			log.error("调用HttpUtils.sendSSLPost IOException, url=" + url + ",param=" + param, e);
		}catch(Exception e){
			log.error("调用HttpsUtil.sendSSLPost Exception, url=" + url + ",param=" + param, e);
		}
		return result.toString();
	}

	private static class TrustAnyTrustManager implements X509TrustManager{
		@Override
		public void checkClientTrusted(X509Certificate[] chain, String authType){}

		@Override
		public void checkServerTrusted(X509Certificate[] chain, String authType){}

		@Override
		public X509Certificate[] getAcceptedIssuers(){
			return new X509Certificate[]{};
		}
	}

	private static class TrustAnyHostnameVerifier implements HostnameVerifier{
		@Override
		public boolean verify(String hostname, SSLSession session){
			return true;
		}
	}
}
